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Frequency synchronization error correction by using DFT in sinusoidal voltage measurements

机译:在正弦电压测量中使用DFT校正频率同步误差

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摘要

The paper presents a method of correcting a frequency synchronization error in the sinusoidal voltage measurement. Correction is performed by changing a frequency of the measured signal on the basis of the respectively determined synchronization error by using DFT. Carried out simulation experiments indicate that the correction can theoretically improve the accuracy of measurement of the RMS voltage to the level below 1 ppm. The results of measurements taken by a highly accurate voltmeter Agilent 3458 confirm the conclusions of the simulation, that it is possible to repeatedly reduce the frequency synchronization error by applying the developed correction method in the voltage measurement.
机译:本文提出了一种校正正弦电压测量中的频率同步误差的方法。通过使用DFT基于分别确定的同步误差来改变测量信号的频率来执行校正。进行的仿真实验表明,该校正理论上可以将RMS电压的测量精度提高到低于1 ppm的水平。高精度电压表Agilent 3458的测量结果证实了仿真的结论,即通过在电压测量中应用改进的校正方法可以反复减少频率同步误差。

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